Assiotok to amalgamated machinery



L. I. YEOIVIANS.

PROCESS 0F MANUFACTURING THE BEARINGS 0F GUN BORING MACHINES.

APPLICATION FILED IUNEQ. IQIII.

w www@ TEE STATES PATENT QFECE@ LCEN l'. YEOMANS, OF CHIGAG, ILLINOS,ASSGNOR T0 AMLGAMATED MACHINERY CORPORATION, 0F CHICAG, ILLINGXS, ACORPORATION 0F DELANARE.

PROCESS 0F MANUFACTRXN THE BEARINGS 0F GUN-BORING MACHNES;

Specification of Letters Patent.

Patented July ii Application filed June 27, i918. `Serial No. 242,190.

To all whom it may concern.'

Be it known that I, LUCIEN l. YnoMANs, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and improved Process of Manufacturing theBearings of Gun-Boring Machines and the like, of which the following isa speciication.

In a gun-boring machine, the head-stock spindle andthe boring bar mustbe accurately alined. rlihe great length of such a machine, however,hasmade it diliicult to obtain such alinement. ri`he object of thepresent invention is to provide a method of attaining accurate alinementof the various bearings in such a machine.

ln the accompanying drawings, Figure l is a view, more or lessdiagrammatic, showing a portion of a gun-boring machine, andillustrating steps in the process of forming the bearings. Figs. 2 and 3illustrate two completed bearings.

ln the drawings, l and 2 denote the spindle bearings of the gun-boringmachine, and 3. are the finished carriage ways. rEhe horizontal andvertical surfaces of these ways are utilized as the datum planes, so tospeak, from which the location of the bores of the various bearings isdetermined.

Two master boring-bar guides are mounted upon the ways 3' to support aboring-bar 5. Any suitable inea is may be provided for rotating,advancing and retracting the bar 5, as, for example, that shown in myapplication Serial No.. 266,408, filed Bec. l2, 1918.

rlhe boring bar 5 is to be employed as a mandrel to locate a. bearingbushing in 'the bearing 2. However, as the distance from the bearing 2to the nearest master boringbar guide is considerable, there would be aslight deflection in said bar. Hence, before using the bar to locate thepermanent bushing in the bearing 2, a temporary support for the bar 5 isfirst provided in the bearing l. This temporary support consists'of abushing 6 which iits nicely upon the bar 5, and is inserted into thebearing l, a master boring-bar guide 4 being positioned upon the waysSas close as conveniently possible to the bearing l. lfhile said bushingis supported upon the bar 5 within the bearing the bearings l and 2.

l, Babbitt metal or the like 7 is employed to secure the temporarybushing 6 in place. The bar 5 is then advanced into the bearing 2, aspacer sleeve 8 is slipped upon the bar 5, the permanent bushing 9 isplaced upon said sleeve, and the permanent bushing 9 is se cured in thebearing 2 by means of babbitt or the like l0. The bushing 9 constitutesone of the bearings for the head-stock spindle of the gun-boringmachine.

After the bushing 9 has been secured in place, the boring-bar 5 iswithdrawn from rihe 'temporary bushing 6 is then removed from thebearing l by pressing it therefrom, said bushing' preferably beingexteriorly tapered to facilitate its removal. The boring-bar is thenadvanced into the sleeve 6, a suitable tool is attached to the bar, andthe bar is rotated and advanced to bore out the bearing l down 'to the Yiron. During this operation, the boring bar 6 'and the adjais supportedby the sleeve cent master boring-bar guide l. rlhe boring-bar is thenretracted and the permanent bearing bushing l1 (Fig. 3) is pressed intothe hole bored in the bearing l. The bushing ll constitutes the otherbearing for the head-stock spindle l2.

The gun-boring machine comprises a carriage 13 to which the boring-bar1d of the gun-boring machine is rigidly secured and by means of whichsaid boring bar Ais advanced and retracted. The gun-boring machine alsocomprises a suitable number of guides l5 slidably mounted upon theca'rriage ways 3 and arranged to support the boring-bar 14 of thegun-boring machine.

After the bearing bushing l1 has been putin place, the bar 5 is utilizedto bore out an opening 16 in the carriagevl to receive a bushing for theboring-bar of the gun-boring machine and to bore out an opening 1T toreceive a earing bushing for said bar in each bar guide 15. For thispurpose the carriage 13 is moupted upon the ways 3 between the masterboring-bar guides l, and the opening 16 bored out to'receive a split orclamp bushing 18. The carriage 13 is then lifted ofi the Ways and Jthebar guides l5 are setupon the ways and'bored out to receive bearingbushings for the boring bar of the gun-boring machine. llvhile the openings 16 and l? of the carriage 1? and the bar guides 15 are being boredout, the boring bar 5 is supported relatively close to the Work by themaster boring-bar guides 4.

It will be seen that the master boring-bar guidesare mounted upon thefinished carriage Ways 3, thatthe openings in the carriage 13 and thebar-guides 15 are bored outv while said carriage and bar guides aremounted on the carriage Ways, and that the boring-bar serves as amandrel in forming bearings for the head-stock spindle.

Thus it will be evident that the head-stock-spindle bearings, thebearings on the bar guides 15 and the clamp on the carriage 13 will beaccurately alined With one another.

The term slidable element is used in the appended claims to denote thecarriage or ba'r guide of the gun-boring machine.

I claim as my invention 1. The process of manufacturing theheadiStock-spindle bearings of a gun-boring machine or the like, Whichconsists in supportingl a boring-bar in a guide located adjacent to oneof said bearings, utilizing said boring bar as a mandrel to support atemporary bearing bushing in said adjacent bearing, babbitting saidbushing in place in I .said adjacent bearing, advancing the boring ing aboring-bar in a guide located adjacent to one of saidbearings,'utilizing said boring haras a mandrel to support a temporary.bearing bushing in said adjacent bearing, securing said bushingtemporarily 1n place in said adjacent bearing, advancing the boring-barinto the other bearing and there utilizing vthe boring-bar as a mandrelto support a bearing bushing, securing said last mentioned bearingbushing permanently' in place', removing the ten'iporary bushing, andoperating` the .boring har to bore out the hearing i-n which' saidtemporary bushing was located While the boring bar is spported in theother bearing bushing and said guide.

3. The process of manufacturing one of two alined head-'stock-spindlebearings of a gun-boring machine or the like, which consists insupporting a boring-bar in one of said bearings, utilizing saidboring-bar as a mandrel to support a temporary bearing bushing in thelast mentioned bearing, securingsaid bush'mg temporarily in place insaid last mentioned bearing, advancing the boring-bar into Vthe otherbearing and there utilizing the boring-bar as a mandrel to support abearing bushing, and securing said last mentioned bearing bushingpermanently in place.

4. The process of manufacturing one of two 'alined head-stock-spindlebearings of a gun-boring machine or the like, which consists in passinga boring-bar through said bearings, -supporting the boring-bar Withiiithe farther bearing, and, While so supporting the bar, utilizing the barto bore out the other bearing.

5. lThe process of manufacturing the headstock-spindle'bearings and thebearing of the slidable element of a gun-.boring machine or the likehaving finished ways to support said element, which consists in mountinga master boring-bar guide on said Ways, utilizing the boring-bar carriedby sald'master boring-bar guide as a mandrel in positioning and securinga bearing bushing 1n one of the spindle bearings, utilizing saidboring-bar While supported in said bearing bushing to bore out the otherspindle bearing, placing the slidable element upon said finished Ways,and utilizing the boring-bar to bore out a bearing in said slidableelement While said boring barV is supported in said master boring-barguide.

6. The process of manufacturing the bearing in' the slidable element ofa gun-boring machine or the like having nishcd Ways to support saidelement, which consists in mounting a master boring-bar guide on saidWays, mounting said element upon said Ways, and actuating a boring-barsupported in said master boring-bar guide to bore out an openj ing insaid slidable element.

1n testimony whereof, I have hereunto Set hand. LUCEN 1. YEOMNS.

